Upgrade ci-slave-1 to elasticsearch 1.4
Upgrade ci-slave-1 to elasticsearch 1.4

Now that rummager is using elasticsearch 1.4, we're sometimes seeing
builds help up waiting for a slave with es 1.4.  This therefore adds a
second machine with es 1.4.

alphagov/ci-puppet,boffbowsh/ci-puppet,alphagov/ci-puppet,boffbowsh/ci-puppet,boffbowsh/ci-puppet,alphagov/ci-puppet,boffbowsh/ci-puppet,alphagov/ci-puppet